Sae Transactions Volume 8, PT. 1

Sae Transactions Volume 8, PT. 1

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 edition. Excerpt: ...rigged up. When running my car I have been able to take samples under all the different conditions, using the ordinary Orsat apparatus hung up with rubber, so as not to get badly jolted in running the car, having one man drive the car and another draw in through the apparatus five or six volumes of about 100 cubic centimeters each, then shutting off, so as to get a good average sample under the ordinary running of the motor. While drawing in 100 cubic centimeters there would probably be 100 or 200 cylinder explosions, resulting in a good sample. I noticed that while driving at 20 miles an hour, the car would run 300 or 400 yards while drawing the 100 cubic centimeters. In comparing analyses of these running tests I had very curious things develop. It was two or three years before I could understand what they meant. Mr. Hopkins tried very nice experiments on a little De Dion motor and developed curves of maximum power efficiency. The facts he got were all right. If you had a motor set under load in the shop to produce 13 per cent. C02 and 1 to 2 CO and a trifle of free oxygen, that would be an excellent mixture. On the road you would not get those same conditions at all. I blocked a car up at the back axle and put the brake against the rear brake drums, to get road conditions, made a note of the whole range and then took the car out on the road without altering the carbureter and tested thoroughly. The road conditions were not the same as the practical conditions in the shop. The reason seems to be that the jar on the motor affects the level in the carbureter considerably, which affects the mixture somewhat. The difference in temperature inside the bonnet under different conditions affects the carburetion very much more than is more

Product details

  • Paperback | 140 pages
  • 189 x 246 x 8mm | 263g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236618149
  • 9781236618146